101 lines
3.4 KiB
Java
101 lines
3.4 KiB
Java
/*
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* Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 5030063
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* @summary Basic tests for flush().
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*/
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import java.io.Closeable;
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import java.io.Flushable;
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import java.util.Formatter;
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import java.util.FormatterClosedException;
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public class Flush {
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private static class ExpectedException extends RuntimeException {}
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private static class F implements Appendable, Closeable, Flushable {
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public Appendable append(CharSequence csq) { return null; }
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public Appendable append(char c) { return null; }
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public Appendable append(CharSequence csq, int s, int e) {
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return null;
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}
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public void close() {}
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public void flush() {
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throw new ExpectedException();
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}
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}
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private static class NF implements Appendable, Closeable {
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public Appendable append(CharSequence csq) { return null; }
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public Appendable append(char c) { return null; }
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public Appendable append(CharSequence csq, int s, int e) {
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return null;
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}
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public void close() {}
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// method coincidentally called flush()
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public void flush() {
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throw new RuntimeException("NF.flush should not be called");
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}
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}
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private static void test(Formatter f) {
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if (f.out() instanceof F) {
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// F.flush() called since F implements Flushable
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try {
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f.flush();
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throw new RuntimeException("F.flush not called");
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} catch (ExpectedException x) {
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System.out.println(" F.flush called");
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}
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} else {
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// NF.flush() not called since NF does not implement Flushable
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f.flush();
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}
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// Formatter is a Flushable
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if (!(f instanceof Flushable))
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throw new RuntimeException("Formatter is not a Flushable");
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// flush() after close() throws a FormatterClosedException
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f.close();
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try {
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f.flush();
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throw new RuntimeException("FormatterClosedException not thrown");
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} catch (FormatterClosedException x) {
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System.out.println(" FormatterClosedException thrown");
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}
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}
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public static void main(String [] args) {
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System.out.println("testing Flushable");
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test(new Formatter(new F()));
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System.out.println("testing non-Flushable");
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test(new Formatter(new NF()));
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}
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}
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